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tar a directory and send it to netcat
tar's directory and sends to netcat listening on port 10000 On the client end: netcat [server ip] 10000 | tar xfvz - This will send it over the network and extract it on the clients machine.

cd to (or operate on) a file across parallel directories
This is useful for quickly jumping around branches in a file system, or operating on a parellel file. This is tested in bash. cd to (substitute in PWD, a for b) where PWD is the bash environmental variable for the "working directory"

exec chmod to subfiles
Using `-exec cmd {} +` causes find to build the command using all matching filenames before execution, rather than once per file.

Which processes are listening on a specific port (e.g. port 80)
swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

Rsync files with spaces
Using the double dash before the source and target makes the command work fine with weird filenames.

Convert text to lowercase
Usage: lower [STRING]...

Protect your eye
Redshift will adjust the color temperature and protects eye at night -b : will adjust the brightness

Remove comments from files
Use sed to remove comments from a file. In this example the comments begin with #. The command '/^#/d' remove line starting with #. The command 's/#.*$//' remove comments at end of lines.

Find usb device in realtime
Using this command you can track a moment when usb device was attached.

Which processes are listening on a specific port (e.g. port 80)
swap out "80" for your port of interest. Can use port number or named ports e.g. "http"


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